When a catastrophic energy experiment goes awry, two of Marvel's mightiest heroes find their powers dangerously intertwined in this animated action spectacle. Adrian Pasdar voices the brilliant and arrogant Tony Stark, whose technological prowess as Iron Man meets its match in the raw, uncontrollable fury of the Hulk, brought to life by Fred Tatasciore. Forced into an uneasy alliance, the genius inventor and the green goliath must overcome their clashing personalities and a literal fusion of their abilities to stop a shadowy and powerful enemy. This new foe, Zzzax, threatens to consume all energy on the planet, presenting a challenge that neither hero can face alone. Blending high-stakes superhero adventure with a surprising dose of humor born from their forced partnership, the film delivers explosive battles and a dynamic that tests the limits of both strength and intellect. As the situation grows more desperate, Iron Man and the Hulk must discover if they can truly become heroes united before the world is plunged into permanent darkness.